社群網站與我們生活密不可分,人們在網站上創造的資料多元且與生活息息相關,根據過去學者將心理擁有權應用於線上隱私情境探討偶有所見,但卻沒有討論影響線上使用者心理擁有權的成因,為彌補此研究上的缺口,本研究提出線上使用者對使用者資料的控制、對社群網站的熟悉感與使用的經驗為形成心理擁有權的重要因素,同時我們也發現社群網站可以透過提升使用者心理擁有權來提高使用者的持續使用的意圖,然而,社群網站使用者會因為隱私顧慮的考量,而負向調節心理擁有權與持續使用意圖兩者之間的關係。研究結果發現,使用者會對自己在社群網站上所張貼的內容產生擁有感有以下三個原因:使用者可以控制自己在社群網站上的發言內容、使用者透過在社群網站上張貼訊息而與朋友產生親密連結、使用者在社群網站上的使用經驗之程度,擁有感的提昇會增加他們對於社群網站的持續使用意圖,但因為隱私顧慮的考量,仍會降低其持續使用的意願。 Using social network site (SNS) service has been a part of our daily life. In the past, only few studies have applied psychological ownership perspective to understand online privacy concern and continuance intention. However, none of these studies investigated the antecedents of psychological ownership (PO). This study aims to explore the critical factors affecting psychological ownership (PO) in social network site (SNS) context. We develop a theoretical model to understand the factors at individual levels that might influence psychological ownership, privacy concerns and continuance intention. Our study proposes that control, familiarity and experience are the three important antecedents of psychological ownership, and discusses this issue through collecting Facebook user data. The results show that control, familiarity and experience positively affect psychological ownership. Psychological ownership positively affects continuance intention while privacy concern negatively moderates the relationship between psychological ownership and continuance intention.